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Finding the Fourth Proportional to 386.28, 533.27 and 239.00

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Solution

The fourth proportional to 386.28, 533.27 and 239.00 is: 329.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.28 : 533.27 = 239.00 : x
  2. Step 2: Convert to fraction form
    386.28/533.27 = 239.00/x
  3. Step 3: Cross multiply
    386.28x = 533.27 × 239.00
  4. Step 4: Simplify right side
    386.28x = 127,447.67
  5. Step 5: Solve for x
    x = 127,447.67/386.28
  6. Step 6: Final answer
    x = 329.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.